Telephone call system



July 3, 1934. F w, L E 1,965,146

TELEPHONE CALL SYSTEM Filed July 18, 1952 7 Sheets-Sheet 1 gnwcplov E TAKE/2175 July 3, 1934.

Filed July 18, 1952 7 Sheets-Sheet 4 July 3, 1934. F. w. KLUGE TELEPHdNE CALL .SYSTEM Filed Jul 18. 1952 7 Sheets-Sheet 5 Y 1934. F. w. KLUGE TELEPHONE CALL SYSTEM Filed July 18, 1932 7 Sheets-Sheet 6 July 3, 1934. F. w. KLUGE TELEPHONE] CALL SYSTEM Filed July 18, 1932 '7 Sheets-Sheet 7 Patented July 3, 1934 UNITED STATES 1,96 TELEPHONE can. svs'rnm Fritz Werner Kluge; Berlin, Germanm'assignor to Fritz Bicknase, Berlin, Germany Application my 18, 1932, Serial No. 623,261

- In France July 15, 1931 Claims.

to dial number, with these control members determining the necessary number of current impulses to be sent over the system in accordance with the previous manually set arrangement of the parts of the particular control member. Thus, after having set the respective control members for different dialing operations and selecting the desired control member, the mechanism is set in operation and the call of that particular control member is sent out over the system exactly in the 39 same manner as in the conventional hand dialing system. v The chief feature of the invention is the fact that the required current impulses or the transmission of the interruption impulses are released 5 or cancelled in a purely mechanical manner controlling the means usually usedin the known numeral dials or by achieving this purpose with similar electrical contactor parts.

The invention provides means for easily changing the position of the cams on the controlling It is known in itself to select individual series from a continuous sequence of current impulses and to utilize them for a predetermined phone 5 connection by means of connecting to the current impulse contact a further adjustable electric contact inparallel-this methodhowever gives rise to the disadvantage that it is easily possible to make mistakes in the connection, and that the possibilities of breakdowns due to the use of movable leads and due to the wear and tear of contacts are very pronounced indeed.

The object of the invention may be achieved in very many different ways and manners. In

the case of one embodiment the control organs of the device may according to the arrangement 01- the desired connection with the subscriber be acting during the operation of the device, act on the conjoint working of the impulse contact and on the insulating disk actuating it in such a manner that the actuation of the impulse contact is put in or-out of action temporarily, in such a manner that all the current impulses or current interruptions including the required stop between the individual current impulsesare passed over (on. na -9o) the subscriber's line in one operation which is purely mechanical, by means of the consecutively acting control means, which may be necessary to establish a perfect connection when a subscriber calls.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which:---

Figures 1 to 3 are a diagrammatic view of the object of the present invention;

Figures 4 to 11 show constructional. forms 0! the control means;

Figure 12 shows a top view of a complete unit of the object of the invention; I

Figure 13 is an end view of Figure 12.

Figure 14 is an end view partly in section show-' ing the clock'work;

Figure .15 is another side view, contact members' of another design being used;

Figure 16 is a detail of Figure 15; i

Figure 17 shows the connection otthe device of the present invention with the necessary electric selector members of a telephone station, and also the connection of both the above to;the lines of a public telephone system;

Figure 18 is a side view of the impulse sender.

Figure 18a is an edge view of the same.

Figure 19 shows a perspective view of a desk like embodiment of the object of the present invention.

Figure 20 shows a perspective view 0! a modification of theapparatus.

Figure 21 is a vertical section through the control disk and cam member used therewith in Fig. 20.

Figure 22 is a rear elevation.

Figure 22a is a longitudinal section 01' the cam member used in the form shown in Figure 20.

Figure 23 is a rear elevation.

Figure 23a is a longitudinal section through a 96 modified form of cam member.

Figure 24 is a view in elevation, partly in dotted outline, of a modified form or control disk with a modified form of cam member.

Figure 24a and Figure 24b an elevation and a 100 plan view of the cams used in connection with Figure 24. v

Figure 25 shows a ratchet wheel and pawl device used in connection with the apparatus.

Figure 26 is a side elevation showing a modlfled form or control'disl: and cam member for cooperation therewith.

Figure 2'7 is a vertical section through the control disk of Figure 26, the cam member being shown inelevation.

Figures 27a and 27b are respectively a vertical section and front elevation of a cam member used in the form shown in Figure 26.

Figures 28 and 29 a special construction for the pawl device acting together with the control members.

Figures 30 and 31' show a protecting cover in section used in connection with the apparatus.

Figure 32 is a view in elevation showing a modiiied form of control disk and cam member there- Figure 33 is a vertical section through the same.

Figure 34 a perspective view of a part of the apparatus.-

In the case of the embodiment as shown in Figures 1 to 5, a number or plurality of control discs 87 the circumference of which is divided by divisions or teeth; and which are mounted on a common spindle, are provided.

According to Figures 4 and 5 the separation and adjustment of the sectors distributed on the circumference is effected by means of cam shaped members which can be displaced as may be required. This displacement may be eifected for instance by arranging the cams or sectors so that they can be displaced by means of springs mounted on the spindle.

A spindle 87b is rotated by means of some driving clockwork or the like, and makes one revolution during one dialling operation. A plurality of control discs 87 are rigidly mounted on said spindle, and they also execute one revolution during one dialling operation. The small wheel constructed of some suitable insulating material is simultaneously rotated by means of gear wheels 90a and 90b during one operation at so many revolutions as there are sector members 85 on. the circumference of the control discs 87.

The small wheel 90 is of the shape or contour as shown in Figure 2, and its revolution therefore causes that a contact consisting of two resilient members 91, i. e. a spring jack is alternately opened and closed. The contact 91 is preferably mounted on a non-circular section spindle 88, which runs alongthe whole length occupied by the control discs.

The contact 91 is the current impulse contact known per se which affects the necessary current interruptions required for carrying the selective operation out in the telephone line, the contacts being those which are customarily used in conjunction with the known numeral or dialling discs.

A pawl 89 is slidably mounted on the spindle 88 and can, for the purpose of actuating it, be displaced in such a manner by means of the cams 85 mounted on the control discs 87, that it can only be actuated at any moment by the cams of one individual control disc 87. By reason that the pawl 89 is actuated by means of the cam 85,

i. e. by reason that it is lifted and lowered by it,

' the contact 'is by means of transmitting the movement through the spindle 88 rocked to such an amount that it is without the reach of the small wheel 90 when the pawl 89 is raised, and it can consequently not yet be actuated whereas said contact comes, if the pawl 89 is depressed,

withinthe radius of action of the wheel 90 and is consequently actuated for so many times during this period as the small wheel executes revolutions in this period. By these means individual I series of current interruptions are effected between which stoppages are interpolated the lifting and dropping of the pawl 89 by means of tlie stop cams must however only occur at the particuiar moment at which. the recessed part of the actuating wheel is in a position opposite the contact 91. This is the reason why it is necessary, and why it is provided according to the invention, that the width of the cam should be such (see Figure 3) that the position mentioned should be reacted at a precisely certain instant. The width of the cam 85 is not a multiple of a division or of the control discs 87 but corresponds to a multiple thereof plus or minus a fraction of such a multiple, for instance the width of the cam may be made four and a half times a division on the control disc. This is also the reason why it is not possible to create the gaps formed by the cams between the individual series of interruptions by forming the whole of the periphery of the control discs of individual teeth of which a certain number is then removed. As may be gathered from the figures the stops or gaps between the teeth and their lengths are caused by the cams 85 whereas the lengths of the individual series of interruptions, that is to say the number of the interruptions occurring during such a series are dependent on the length of the distance between two stop cams. As these lengths depend on the call number chosen, for the purpose of being able to be altered to another one, the cams 85 are so designed that their position on the periphery of the control discs 87 can be altered. As this change of the position of the cam must be effected accurately and as it must also be easy to efiect it by even unskilled hands, special care has been devoted to the design thereof.

The Figures 4 to 11 show constructional forms of such adjustable cams in conjunction with their corresponding control disc.

In all cases the cams 85 are designed as springs rotatably mounted on the principal spindle which can be fixed in a predetermined position by means of a tooth, pin or the like on a gearing or the like provided on said control discs.

Figures 4 and 5 show the front and side views of a control member, designed as a toothed disc, the resilient cams 85 being so distributed over the circumference of the disc as to correspond to a certain subscriber's number that may be chosen.

Figures 6 and '1 represent the particular position of the resilient cams which arises when a previous arrangement of the cams is cancelled to enable another one ,to be obtained, 1. e. when all the cams are pushed together at the zero point. The pushing together of the cams or arms is made possible by giving the teeth of the toothed disc and the camsa special shape.

Figure lo represents such a cam 85 withits corresponding tooth on an enlarged scale.

-Figures8, 9 and 11 show a constructional form of the control members, but in this case perforations and pins fitting into them are used instead of teeth.

For the purpose of enabling the cams or arms 85 to be changed over to another position corresponding to another subscriber's number, without having to remove the disc from the apparatus and to enable this position changing to be effected from one side of the apparatus only it must be possible torevolve said cams or arms, without engaging the clockwork or other arfangement driving the apparatus, and without having to interfere with said driving gear. To enable this to be effected all the'control discs 8''! are not fixed directly on the spindle 87!) but are mounted on a tube or sleeve 87a pushed over said spindle 8711; a coupling 870 being provided allowing said tube 87a and the spindle 87c to be coupled together or uncoupled. If the control discs are to'be rotated for a change over then the coupling 870 must first be uncoupled.

Figures 12 to 16 show a complete embodiment of the invention. Figure 12 clearly shows the construction and arrangement of the control discs 87, the adjustable pawl 89 and the arrangement of these members in relation to a clockwork driving arrangement 13. 14 represents a winding up lever which winds the spring 15 up when it is depressed. A sliding member 16 is also arranged on the lever 14, its purpose being to enable the adjustable pawl 89 to be adjusted from outside the apparatus. 1'7 is a wheel'by means of which the coupling 870 (Figure 1) can be operated and by means of which the cams may be revolvedin their. positions for another subscribers number.

Figure 13 shows a side view of Figure 12 in which the electric contact organs and the organs actuatirig them are clearly shown, as are also the necessary release and stop organs of the clock or spring mechanism.. 91 is the impulse contact,

mounted rotatably around the axis 88. Its functioning in conjunction with the insulated wheel 99 and the control discs 87 necessary for the impulse control has been fully described at the beginning of the specification. 18 is a contact prose and has the purpose to short circuit the speaking circuit of the telephone exchange during the sending of a series of interruptions so that no noises shall be heard on the speaking circuit. This contact may however only be closed for the duration of the selecting operation, as a conversation can only be carried on whensaid switch is open. Care has therefore been taken in the present invention by suitable means, that immediately the selective operation is terminated the said. contact is instantly reopened, consequently the apparatus is ready for speaking from that very moment, i. e. it is not necessary to wait until the mechanism has completely run down, i. e. until the control discs have made a complete revolution.

Consequently the period of time necessary to make a connection is not in every case equal to the time corresponding to the complete nmning down of the driving mechanism, but merely depends an that time-which is necessary for the impulses and steps necessary for the making of the required connections. This purpose is achieved by making that cam 85 which is the last to pass the pawl 89 somewhat longer; than the other cams, so that the pawl 89 is lifted somevwhat higher up bythis last cam than by the others, thus causing the complete system 89, 88,

91 to drop behind a stop device 19, which retains the'system above mentioned in this position, the said system holding the contact 18 open in this position.

tact'ors or wipers from a numeral plate of a foreign post oflice have been used.

Figure 14 shows a section through the winding mechanism 13 of the spring (see Figure 12).

Figure 16 shows the side view of the impulse c'ontactor 91' of Figure 15 and'clearly shows that owing to the different designpf this contact, it must be rocked around the spindle 21. Figure 15 shows the spring of the mechanism. 20 is an air brake ensuring a uniform speed of the mechanism. Figure 1'7 shows an automatic telephone exchange T involving the circuiting members 18' and the contact members 91' coupled with the mechanism of the present apparatus, indicated at A, and showing the circuiting contact 18 and the impulse sender 91, the exchange line being indicated at X.

. Figure 19 again shows a complete embodiment of the object of the present invention, according to Figure 12, Figure 19 being an external view of it. 22 is a housing covering the complete apparatus, a tablet bearing the names of the individual subscribers which can be called at choice being fixed to the top of saidhousing. This tablet is so arranged that it can be tilted up or laterally displaced or in some other suitable manner, 'so that when this is done the change of a, subscribers number to another one can easily 95 be effected through a common opening beneath the tablet. So as to be able easily to effect the choice of any one of the subscribers mentioned on said tablet the sliding member 16 is provided with a hand or tongue 24 which can be by means of displacing the slider 16 brought over that part of the tablet or list which has the name of the wanted subscriber.

The adjustable cams need not necessarily, as is the case shown in the embodiment engage into tooth shaped notches of the carriers, as any other suitable means of support might be used, thus for instance the preferably resilient cams might be provided with small pins fitting into corresponding perforations in the disc like support, or "vice versa the cams might be provided with suitable holes engaging with pins rigidly fixed into the disc shaped support (Figures 8, 9 and In the mode of execution of Figures 20' and 21 the contact discs 87 have on their circumference recesses a, into which the cams 85 are introduced with their elastic noses b.

In Figures 20 and" 21 the cams 85 are shown in t the form of sheet metal springs and provided 126 above the nose b with a little hole c, into which a hook like tool can bejntroduced for easily adjusting the cams in their position. (See also Figure 22.) r

The cams according to Figure 23 showing a little handle cl, which is obtained by punching Y .and bending astrip out of the body of the sheet metal cam 85.

According to Figures 24, 24a and 24b, cams 85a are used consisting of a leaf spring with a looped 130 end e, which can be introduced-into the recesses f of the control discs 87 so that the cams are held in their position only by means of the friction between the looped end e and the walls of the recesses f.

The cams according to Figures 20 to 22 may be adjusted intheir position without. opening the housing of the apparatus, if the housing is provided with the necessary 'slots (Figure 20),

through which a suitable tool can be entered for $39 changing the positions of the cams. Figure 25shows a ratchet wheel 87s, which is attached tothe hollow axle 87a. Into the teeth of this ratchet wheel a pawl 87t-ente'rs. This pawl is pivoted on a rigid part of the apparatus and has the purpose that after interrupting the coupling between the hollow shaft 871: and the clockwork toprevent the backward rotation of the. contact discsin essential amount, butis not ;;o

preventing a free rotation of the contact discs in the opposite direction.

If this precaution were not provided it could happen that by the free return movement of the discs the cams 85 could act upon the pawl 89 and could disturb the correct function of the apparatus.

A little backward movement, for instance for an inch, is useful for the regular distribution and position of the cams in respect oi. the discs 87.

The whole apparatus is divided into two compartments in such a way that in one of the compartments the delicate contact parts and the clockwork are contained, whereas in the second compartment only the contact discs are arranged so that the user of the apparatus can only come into touch with this second compartment for changing the position of the cams on the discs 87 either directly after taking oif the cover or through openings in the cover, without being able to disturb the correct position of the contact parts and the gears or means for displacing the delicate contact parts. a

The contact device and its gear is enclosed in a special protecting cover which is sealed and cannot be taken ofi by the public.

For easily adjusting the pawl 89 (Figure 28) with regard to the different contact discs 87 a rule is providedwith notches or depressions 89b into which an elastic pawl 890 can jump, when the pawl 89 has reached the exact position with regard of the desired contact disc 87.

Figures 26 and 2'1 show a disc 87 with teeth 87g regularly dividing the whole circumference of the disc for exactly positioning the cams 85. These cams may-be adjusted by means of a special tool through slots 8 (Figure 34) without opening the apparatus.

Figures 30 and 31 show a cover 101 for enclosing the contact parts and their gears and this cover may be provided in its inside with fabric or felt for dampening the noise.

Figure 31 shows the sealing of this cover so that the user of the apparatus cannot tamper with the delicate parts of the apparatus.

In the mode of execution of Figures 32 and 33 the disc 87 has teeth on its circumference and the cams are in form of leaf springs with a pawl 100a. A pointer 1001) (Figures 32 and 33) is moved with regard to a fixed scale so that the pawls 85 maybe adjusted from outside the cover, as the pointer v is dust tight. Inside the scope 1002: always shows the exact position of the cams wit1i regard to the disc 87.

The jumping in of the pawl a into the teeth of the disc 87 can be observed, as this jumping in is accompanied by a little noise. ratusmay be surrounded by a second cover which of the patent there could be made different changes.

Theapparatus involves a clockwork motor, which may be of any conventional or preferred type, though obviously other types of motor may be used. As illustrated, the motor involves a segment 100 operated on the depression of the handle 14 to operate through a train of gears, indicated generally at 101 to wind the spring 102, which spring on the release of the handle and through appropriate clutchmechanism (not necessary to illustrate) drives gear 103 to'turn the hollow shaft 87a and so turn the control disks 85.- The gear operates the rotating element 90 of the impulse sender, the contacts 91 of which are moved intoand out of a position to be engaged by the rotating member 90 according to The whole appathe set of the cams on the particular control disk and be used to send the call.

,On reference to Figure 4, it will be seen that the cam members 85 are spaced different distances apart on the periphery of the control disk, and as the finger of the member 89 rides over these cams, it will rock the contact members 91 out of the path of movement of the rotating member 90. Intermediate the cams, however, the contact members 91 are permitted to be moved into the path of the rotating member 90, with the effect of sendingan impulse during 'each rotation. If the space between the cams is arranged in accordance with the rotation of the member 90, it is apparent that for each selected distance between cams, the rotating member 90 will make a definite number of revolutions and send a definite number of impulses. These impulses representing the number of the call, it is apparent that the spacing of the cams can control the number of impulses sent between each pair of cams and thus control the number exactly in accordance with the usual hand dial control.

As the member 91 is initially rocked, it closes the telephone circuit 18, preventing any other influence on this circuit. The lever 19 automatically moved by the spring 104 serves to maintain the talking circuit 18 closed .during the operation of the controlmember. The final cam of the member is, however, higher with respect to the periphery of the control disk than the preceding cams, and as this cam acts on the member 89, the swinging contact 91 is moved through-a greater are and thus slightly raises the already closed talking circuit terminals 18, and at this time a pin 105 on the appropriate element of the clockwork rocks the lever 19 against the influence of the spring 104, and as 1 the member 91 returns to its'normal position, the

no particular showing of this detail being neces,

sary.

I claim:- 1. An impulse sending apparatus for use in connection with telephones including a switch for the talking circuit of the telephone, a con- 'trol disk, means for imparting one revolution to the disk, a series of cam members co-operating with the disk and independently adjustable relatively thereto to provide selectively spaced elements projecting beyond the periphery of the disk, circuiting members for governing circuiting conditions, an impulse sender operating simultaneously with the disk at a relatively increased speed and acting on thecircuiting members at each revolution to send an impulse over the circuit, means controlled by the can; members for preventing impulse sending cooperation of the impulse sender and the circuiting member, said means when free of the cam members permitting impulse sending through cooperation of the impulse sender andthe'circuiting members, and

a cam on'the to operate the telephone circuit controlling switch'through said means following-completion of the impulse sending of that disk.

2. An impulse sending apparatus for use in connection with telephones including a switch for controlling the condition of the talking circuit of the telephone, a control disk, means for imparting a single revolution to said disk, a series of cams adjustable relative to the disk to provide projections beyond the periphery of the disk with variable selected distances between them, an impulse sender operated simultaneously with and at selected relatively increased speed to that of the disk, circuiting members influenced by the impulse sender for sending impulses, an element controlling the operation of the impulse sender and said circuiting members, said element being operated by the cam projections beyond the periphery of the disk to move the circuiting members beyond the influence of the impulse sender, and a cam on said disk and operative following the completion of the operation of the series of cams to move the circuiting members to a position to open the switch of the telephone circuit.

3. A construction as defined in claim 2, including means for locking the circuiting members in position to maintain the telephone switch open while the parts are at rest.

4. A construction as defined in claim 2, including means for locking the circuiting members in position to maintain the telephone switch open when the parts are at rest, and means actuated in the initial operation of the disk to release the circuiting members to permit the telephone switch to close.

5. A'construction as defined in claim 2 wherein all cam members are mounted for independent and selective movement on the axis of the control disk, with cooperating means on the members and disk for fixing the members in desired relative positions.

FRITZ WERNER KLUGE: 

